Cat industrial engines brochure

®
W H E R E T H E W O R L D T U R N S F O R P O W E R
ratings guide
INDUSTRIAL ENGINE

Caterpillar®
Engines
For higher performance and lower
costs, invest in the advanced
technology of Caterpillar engines
Caterpillar engines are known around the world for
their durability, performance, and operating economy.
Whether they are used in earthmoving equipment, on-
road or off-road vehicles, industrial power situations,
or dozens of other applications, Cat®
engines have set
new standards for decades. And to make sure the
engines you specify give you every possible
competitive advantage, we work to keep pushing
performance to even higher levels.
Today’s line-up of Cat engines offers some of the most
advanced engineering features available for industrial
power applications. These include electronic engine
controls, the HEUI™ (Hydraulically Actuated
Electronically Controlled Unit Injector) fuel systems,
MEUI (Mechanical Electronic Unit Injector), and
exclusive technologies that dramatically reduce engine
emissions.
Meet EPA/EURO standards today
The United States Environmental Protection Agency
will implement diesel engine gaseous emissions
Tier 3 standards starting with engines built after
January 1, 2005. Similar exhaust emissions standards
for Stage IIIa will be implemented within the EEC
countries in 2006.
Stationary, railway, and underground mining engines
are exempt. EPA has defined stationary as an engine
that does not move from a given location for one year
or more. The regulation covers engines on tracks,
rubber tire vehicles, deck or propulsion, skids, or
offshore portable platforms.
Caterpillar offers diesel engines in three product lines:
those certified to meet the new EPA, the current Tier 2
standards, and the standard non-certified.
ISO 9001 Certification
In 1992, Caterpillar’s Mossville Engine Center received
ISO certification. Today, 23 Caterpillar departments or
facilities have been ISO 9001 certified including our
Large Engine Center in Lafayette, Indiana. This
company-wide commitment to quality has translated
into high customer acceptance in the diesel and gas
engine markets worldwide.
Cat ACERT®
Technology
Tier 3 certified engines include Cat ACERT Technology,
a clever blend of improved air management,
sophisticated electronic controls and advanced fuel
injection. Caterpillar engines do not require
aftertreatment to meet Tier 3/Stage IIIa standards.
Table of Contents
EPA & EU Non-Road Emissions Regulations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Electronic Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Diesel Engine Rating Definitions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Caterpillar Engine Monitoring System (EMS) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
3003, 3011C, C1.6, 3013, 3013C, 3024C and 3044C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
3054, 3054C and 3054E . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
3056 and 3056E . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
C6.6 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
3126 and 3126B . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
C7 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11
C-9 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
C9 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13
C-10 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
C11 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15
C-12 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
C13 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17
3406 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
C-15 and C-16 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
C15 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20
C18 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21
3408 and 3412 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
3412E . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
3500 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
3500B . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
3600 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
3600 Heavy Fuel Engines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Gaseous Fuel Engines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
G3300 and G3400 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
G3500 and G3600 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Underground Mining MSHA Certified Engines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Worldwide Support . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .BACK COVER
Match a reliable Cat®
engine to your application
Engine
2
I N D U S T R I A L E N G I N E R A T I N G G U I D E

130-560
19-37
75-130
37-75
Emissions Regulations
3
EPA & EU NON-ROAD EMISSIONS REGULATIONS
Tier 3 Changes for Consent Decree Signatories
U.S. EPA Non-Road
European Non-Road
Tier 1
Stage I Stage II
3 dB Reduction
in Machine Noise
Level Required
Noise Directive
2000/14/EC
IMO NOx
Regulation
Bold = bkW
Regular = bhp
Tier 2 Tier 3
Stage IIIa

Technology
New Tier 3 Engines Utilize State of the
Art Electronics
Cat has brought the computer revolution to your engine
with new high-tech tools such as Cat Messenger, Cat
Pocket Technician, and a new emphasis on an old
friend. The ADEM™
engine control system you already
have in your current engines has been upgraded, as
Cat introduces the ADEM 4.
ADEM 4
With the ADEM 4 and ACERT Technology it’s not
longer just an engine, it’s tomorrow’s engine, smarter
and cleaner, but from the same the company you
know and trust.
ADEM 4 is the latest version of Cat’s unique
electronic engine control system. The new ADEM 4
gives you more knowledge of the inner workings and
performance of your engine. In addition, ADEM 4
grants you more control over engine performance
with precise fuel control. Precise fuel control is
achieved through a new technology of injection
timing and delivering the precise amounts of fuel.
ADEM 4 continuously monitors your engine
parameters and adjusts accordingly; this timing
mechanism replaces all need for mechanical timing
units. ADEM 4 maintains power even with changing
fuel temperature; it allows for customizing engine
speed, switching control speed changes, and
controlling idle levels. Speed control is established
through ADEM 4 controlling the fuel input. The ADEM
4 takes on the additional responsibility of ether and
fuel-air ratio control, it protects the engine and the
environment. ADEM 4 is one smart controller, which
includes even more benefits of a remote shut down
and is password protected.
ANALOG GAGE
Cat Industrial offers a suite of round dial gages, also
referred to as Analog gages, that receive data from
electronic control modules over the J1939 CAN data
link. The Cat J1939 gages operate on 12 and 24 volt
systems. Individual gages are available to display
common engine status and system information such
as engine speed, pressures, temperatures, fuel rate,
and percent load. A liquid crystal display on the
tachometer gage can display engine hours and
diagnostic codes. Each gage also offers two LED
indicators that alert the operator of problems with the
system or data link communications. Most gages are
offered with 2 or 3 inch diameter dial and are easily
installed with thread nut mount and integral 6-pin
Deutsch connector.
Electronic Control Features/Benefits
Precise engine speed governing
Torque rise shaping
Air-fuel ratio control for quicker response with less smoke
Cold start-up mode permits lower temperature starts without ether, delays start-up
acceleration for minimized wear
Automatic altitude compensation
Automatic throttle calibration
Fuel temperature compensation maintains horsepower
Engine and auxiliary monitoring
High coolant temperature warning
Low oil pressure warning
Instantaneous data on engine hours, fuel consumption, load factor, and operating
conditions, plus lifetime totals
Electronic Components
Electronic Control Module (ECM)
40-pin dedicated customer connector
Primary and back-up speed/timing sensors
Oil pressure sensor
Coolant temperature sensor
Fuel temperature sensor
Boost pressure sensor
Atmospheric pressure sensor
Inlet air temperature sensor
Throttle position sensor
Coolant level sensor (optional)
Standard Customer Features
Optional speed control switches
Diagnostics and fault logging
Service tool connector
Remote shutdown switch
Information Management
Caterpillar Datalink and SAE J1939 Datalink Service Tool Interface
Read/change parameters
Display status
Display diagnostic messages and logged events such as engine overspeed,
high coolant temperature, and low oil pressure
Calibrate/monitor sensors
Interactive diagnostics, including cylinder cutout, ether system, injection actuation
control valve sweep, injector solenoid tests
Standard Electronic Engine Features
4
Optional Hardware Configurations
Engine shutdown switch Intermediate speed switch
Air shutoff solenoid 12 or 24 volt system
Coolant level monitoring Auxiliary pressure sensor
Temperature sensor Overspeed verify switch
Auxiliary temperature sensor Maintenance clear switch
Ether override switch Ether relay
Torque limit switch
Customer Programmable Parameters
Low/high idle speed Top engine limit
PTO ramp rate Engine monitoring
Equipment ID Maintenance indicator
Customer passwords Intermediate engine speed
Torque limit Ether start control
PTO Mode Power Trim
Direct Fuel Control Rating Select
Direct Speed Control (J1939)
Display Options
Industrial Engine Monitoring System (EMS)
Dash display/control panel
Warning lamp
Diagnostic lamp
Maintenance DUE lamp
Maintenance interval
ADEM 4
Engine Controller
Cat J-1939

Technology
Diesel Engine Rating Definitions
Abbreviations
NA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Naturally Aspirated
T . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Turbocharged
TA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Turbocharged/Aftercooled
TTA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Twin Turbo Aftercooled
PC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Precombustion Chamber
ATAAC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Air-to-Air Aftercooled
bhp . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Brake horsepower
kW . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Kilowatts
LE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Low Emission
JWAC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Jacket Water Aftercooled
E . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Electronic
Cat Messenger
Electronic display unit for monitoring key engine
operation data and diagnostic information on a
full graphic LCD screen. The product has four
select buttons to scroll through the engine data
and diagnostic screens and navigate through the
display configuration menu to change display
settings. The connection to the engine control
module is via the J1939 CAN data link.
An engine status and diagnostic display all in one
little neat little package. Messenger monitors the
engine for detected or potential problems, and
alerts the driver/operator to take corrective action
or schedule the engine for service. Messenger
provides diagnostic information, SAE standard
diagnostic codes as well as a brief text
explanation.
Explanation of Ratings A, B, C, D, and E:
Note: Application examples are for
reference only. For an exact
determination of the appropriate rating,
contact the factory or your local
Caterpillar dealer.
Rating Conditions:
All ratings are based on SAE J1349
standard ambient conditions of 100 kPa,
30% relative humidity and 25° C (77° F).
Ratings also apply at AS1501, BS5514,
DIN6271, and ISO3046/1 standard
conditions. Power is based on API
gravity of 35 at 15° C (60° F), fuel having
a LHV of 42 780 kJ/kg used at 29° C
(84° F) with a density of 838.9 g/L.
Ratings are the total output capability
of the engine equipped with standard
accessories: lube oil, fuel oil, and jacket
water pumps.
A Rating: (Continuous)
• For heavy-duty service when engine
is operated at rated load and speed
up to 100% of the time without
interruption or load cycling.
• Time at full load up to 100% of the
duty cycle.
• Typical application examples include
pipeline pumping and ventilation.
B Rating:
• For service where power and/or
speed are cyclic.
• Time at full load not to exceed 80% of
the duty cycle.
irrigation, where normal pump
demand is 85% of engine rating; oil,
field mechanical pumping/drilling; and
stationary/plant air compressors.
C Rating: (Intermittent)
• For service where power and/or
speed are cyclic. Horsepower and
speed capability of the engine can
be utilized for one uninterrupted hour
followed by one hour of operation at
or below the A rating.
• Time at full load not to exceed 50%
of the duty cycle.
agricultural tractors, harvesters and
combines; off-highway trucks; fire
pumps; blast hole drills; rock
crushers; wood chippers with high
torque rise; portable air
compressors; and oil field hoisting.
D Rating:
• For service where rated power is
required for periodic overloads. The
maximum horsepower and speed
capability of the engine can be
utilized for a maximum of 30
uninterrupted minutes followed by
one hour at the C rating.
• Time at full load not to exceed 10%
of the duty cycle.
off-shore cranes; runway snow
blowers; water well drills; fire pump
certification power.
E Rating:
• For service where rated power is
required for a short time for initial
starting or sudden overload. For
emergency service where standard
power is unavailable. Horsepower
and speed capability of the engine
can be utilized for a maximum of 15
uninterrupted minutes, followed by
one hour at the C rating or duration
of emergency.
• Time at full load not to exceed 5% of
the duty cycle.
• Application examples include
standby centrifugal water pumps; oil
field well servicing; crash trucks; and
gas turbine starters.
5
Cat Messenger
Cat Pocket Tec
You’ve heard the expression of "taking your work
with you". Now you can join in, by taking your
engine with you.
Cat allows you to capture your engine data in real
time, easily track your oil change intervals and get
instance advice on diagnostic problems.
The PALM™
with Pocket Technician installed
includes a plug-in dash adapter allowing you to
communicate directly to your engine when you
need to perform diagnostics.
The Pocket Technician includes 20 engine
operation status parameters and "read and
change" capabilities on 21 engine parameters.
Cat Pocket Tec

Range of 3 and 4 cylinder water cooled engines have
been evolved to meet current and future requirements
in construction, material handing, agriculture/turf,
genset and compressor market segments resulting in
significant range improvements over their
predecessors.
Key Benefits
High Performance : Horsepower and torque
capabilities optimized with up to 10% increase over
previous models combined with continuous operating
angles increased to 35 degrees, making machines
more productive and versatile.
Quality by design for durability : Product design and
process improvements have been used from early
stages to enhance engine reliability and durability
Clean and Quiet Power : cleaner, meeting Tier 2
(Stage II) emissions standards and with reduced
smoke output. By improving the combustion process
and incorporating variable injection timing, diesel
operation is possible in the most sensitive
environment. Quieter, typically, 3 db(A) noise reduction.
Easy low cost maintenance : Increased service
intervals to 500 hours and improvements in oil
consumption typically down to 0.2 percent of fuel used,
further contributing to lower running costs.
Key Features
• Compact timing device injection pump
• Closed circuit breather
• Improved governing system
• Optimized injectors
• Smaller installation package
3000
Specifications
3024C
EPA Certified
Abbreviations used:
NA..............Naturally Aspirated
T..................Turbocharged
* 3013C and 3024C ratings Meet Tier 2, Stage II emissions requirements. Tier 2 refers to EPA (U.S.)
standards. Stage II refers to European standards.
D I E S E L S
6
3013C 3024C 3044C
mm (in) 84 x 90 84 x 100 94x120
(3.3 x 3.5) (3.3 x 3.9) (3.7x4.74)
liter (cu. in) 1.5 (92) 2.2 (134) 3.3 (201)
kg (lbs) 149 (329) 184 (406) 245 (540)
mm (in) 533 (21.0) 646 (25.5) 781 (30.7)
mm (in) 427 (16.8) 426 (16.7)(NA) 649 (25.6)
mm (in) 621 (24.5) 674 (26.5)(NA) 769 (30.3)
3003 3011C C1.6
mm (in) 75.0 x 72 77 x 81 77x81
(2.9 x 2.8) (3.0 x 32) (3.0 x 3.2)
liter (cu. in) 1.0 (61) 1.1 (69) 1.6 (97.5)
kg (lbs) 83 (183) 87 (191) 104 (229)
mm (in) 459 (18.1) 496 (19.5) 55 (21.7)
mm (in) 377 (14.8) 400 (15.7) 377 (14.8)
mm (in) 553 (21.8) 578 (22.6) 570 (22.4)
Bore x Stroke
Displacement
Ship Weight (NA)
Approximate Dimensions:
Length
Width
Height
Bore x Stroke
Displacement
Ship Weight (NA)
Length
Width
Height
3003 RATINGS In-line 3
NA bkW bhp rpm
15.1 20.3 2800
17.5 23.5 3600
C Rating
(Intermittent)
3013C RATINGS In-line 4*
NA bkW bhp rpm
20.7 27.8 2200
22.3 29.9 2400
23.4 31.4 2600
24.4 32.7 2800
25.1 33.7 3000
3011C RATINGS In-line 3
NA bkW bhp rpm
18.4 24.7 2800
19.5 26.1 3000
NA bkW bhp rpm
31 41.6 2200
34.1 45.7 2400
35.7 47.9 2600
37.3 50 2800
38 51 3000
T
44.7 60 2800
C Rating
(Intermittent)
C Rating
(Intermittent)
C Rating
(Intermittent)
C Rating
(Intermittent)
C1.6 RATINGS In-line 3
NA bkW bhp rpm
26.5 35.5 3000
3044C RATINGS In-line 4
NA bkW bhp rpm
43 57.6 2600
T
60 80.5 2600
C Rating
(Intermittent)

bkW bhp rpm
NA
50.0 67.0 2000
52.0 70.0 2200
T
68.5 92.0 2200
69.0 92.5 2100
74.5 100.0 2200
78.0 104.0 2100
79.5 106.0 2200
80.5 108.0 2400
TA
84.5 113.0 2100
85.5 114.5 2200
91.0 122.0 2200
3054B RATINGS In-line 4
bkW bhp rpm
NA
57.0 76.5 2000
58.5 78.5 2100
60.0 80.5 2200
63.0 84.5 2300
64.0 86.0 2400
EPA Certified
Abbreviations used:
TA...............Turbocharged/Aftercooled
E..................Electronic
* 3054C/3054E ratings Meet Tier 2, Stage II emissions requirements. Tier 2 refers to EPA (U.S.)
A new 4.4 litre, 4 cylinder engine provides a choice
of naturally aspirated, turbocharged and turbo, air to
air charge cooled variants. This completely
redesigned engine offers the choice of mechanical
or electronically controlled specifications for all
aspirations.
Key Benefits :
capabilities optimized
Broad Application Range : Big displacement, more
performance for your money, convenient installation
Fuel Economy : greater degree of timing control
leads to improved fuel efficiency throughout the
speed range and lower fuel cost for the operator
Clean and Quiet Power : cleaner, meeting Tier 2
(Stage II) emissions standards and free from visible
smoke throughout operational speed range quieter
with up to
3 db(A) reduction in bear engine noise
Easy low cost maintenance : Convenient positioning
of service points for easy accessibility.
Improvements in top tank operating temperature
coupled with an improved gear driven water pump
and optimized flow patterns within the cylinder head
give best heat extraction, therefore minimizing
radiator requirements and facilitating compact
machine design. Service intervals are at 500 hours
as standard
Choice of Electronic Control : Choice of electronic
control or mechanical options available on all
aspirations.
Key Features :
• Cross flow cylinder head
• New gear train
• New balancer design
• Integrated closed circuit breather
• Electric lift pump
• Open top deck block
• Integral Oil cooler
• Choice of mechanical or electronic FIE.
3054 • 3054C
Specifications
3054C
3054 3054B 3054C/3054E
100 x 127 (3.9 x 5) 103 x 127 (4 x 5) 105x127 (4.1x5)
4 (243) 4.2 (258) 4.4 (269)
273 (601) 273 (601) 295 (650)
646 (25.4) 646 (25.4) 663 ( )
646 (25.4) 612 (24.1) 563 (22.2) (NA)
772 (30.4) 775 (30.5) 775 (30.5) (NA)
D I E S E L S
Bore x Stroke mm (in)
Displacement liter (cu. in)
Ship Weight (NA) kg (lbs)
Length mm (in)
Width mm (in)
Height mm (in)
C Rating
(Intermittent)
bkW bhp rpm
NA
50 67 2200
54 72 2200
62 83 2400
60 80 2200
T
60 80 2200
64.5 86 2200
72.5 97 2200
72.5 97 2400
TA
78.5 105 2400
83.5 112 2200
87 117 2200
95 127 2200
C Rating
(Intermittent)
3054E RATINGS In-line 4*
bkW bhp rpm
TA
80 107 2200
87 116 2200
95 127 2200
104 140 2200
C Rating
(Intermittent)
C Rating
(Intermittent)
7

This large displacement engine completes the 3000
Family range with standard air to air charge cooling
and full authority electronic engine management
providing enhanced engine performance with the
opportunity for sophisticated control and machine
integration.
Key Benefits :
capabilities optimized
Broad Application Range : Big displacement, more
performance for your money, convenient installation
Fuel Economy : Improved fuel efficiency gives
savings in operating costs
Clean and Quiet Power : cleaner, quieter meeting Tier
2 (Stage II) emissions standards and free from visible
smoke throughout operational speed range
Easy low cost maintenance : Convenient positioning
of service points for easy accessibility. Service
intervals at 500 hours as standard
Electronic Control : electronic control is standard to
give the operator full machine integration, engine
history, and machine protection.
Key Features :
• Multi-piece Exhaust Manifold
• Engine Control Module
• High Contact Ratio Gear Train
• Peripheral fixed top cover
• Revised rear end oil seal
3056 3056E
100 x 127 (3.9 x 5) 100 x 127 (3.9 x 5)
6 (365) 6 (366)
410 (902) 505 (1113)
934 (36.8) 933 (36.7)
63 (25.1) 697 (27.4)
771 (30.4) 792 (31.2)
3056
Specifications
3056E
8
bkW bhp rpm
NA
76.0 102.0 2000
76.5 103.0 2000
78.0 105.0 2100
79.0 106.0 2200
80.5 108.0 2200
84.5 113.0 2400
85.5 114.5 2500
T
85.0 114.0 2300
86.5 116.0 2200
87.0 117.0 2000
87.5 118.0 2100
103.5 139.0 2200
107.0 143.5 2300
110.5 148.0 2400
112.0 150.0 2500
113.0 151.5 2200
113.5 152.0 2300
TA
119.5 160.0 2200
123.0 165.0 2000
123.0 165.0 2100
128.0 172.0 2200
131.0 176.0 2300
133.5 179.0 2400
134.5 180.0 2500
EPA Certified
Abbreviations used:
E..................Electronic
* 3056E ratings Meet Tier 2, Stage II emissions requirements. Tier 2 refers to EPA (U.S.) standards.
Stage II refers to European standards.
D I E S E L S
C Rating
(Intermittent)
Ship Weight kg (lbs)
Length mm (in)
Width mm (in)
Height mm (in)
3056E RATINGS In-line 6*
bkW bhp rpm
TA
85 114 2200
95 127 2200
97 130 2200
98.5 132 2000
98.5 132 2500
106 142 2200
106 142 2300
108 145 2000
112 150 2200
112 150 2500
118.5 159 2200
120 168 2200
127 170 2000
129 173 2000
129 173 2200
129.5 174 2300
129.5 174 2500
129.5 180 2200
C Rating
(Intermittent)

C6.6
Key Benefits :
Noise reduction: The C6.6 ACERT was designed to
meet the upcoming European and North American
noise regulations. The C6.6 has an insulated timing
cover and an isolated oil pan and valve cover. The
added insulation and separation help diminish the
noise perceptible from the engine. Tighter gear
tolerance has helped to reduce gear backlash and
any noise emitted from the gear train. The C6.6 emits
3-5 decibels lower than it’s predecessors.
Fuel Efficiency: Fuel efficiency is achieved through
the demand-based pump, which allows for only high-
pressure fuel to be pumped into the fuel injectors.
The engine achieves low parasitic loss because less
energy is required by fuel pump.
Leak Free Design: The C6.6 ACERT provides less
opportunity for leaks by switching between high and
low pressure, which minimizes the number of parts
that experience high pressure. Also, the C6.6 was
designed with internal fluid passages to reduce
leaks.
Reliability: The C6.6 includes the proven technology
of the poly-vee belt, which has increased belt
strength and decreases maintenance. The v-belt
reduces belt wear, which improves the reliability. The
C6.6 incorporates the tested and proven HEUI pump
that provides power for the unit injectors.
Durability: Increased block and crankshaft strength
gives the C6.6 ACERT a robust design and increases
ratings and power density. The C6.6 has been
designed and endurance tested to achieve over
10000 hours of useful life. The injector tips are the
only part of the unit injector to be exposed to the
high-pressure fuel system during injection. This
limited exposure, along with increased fuel efficiency
and decreased engine wear are all made possible by
the improved three-way valve injector.
Key Features :
• HEUI single fluid fuel system
• Oil lubricated fuel pump
• ADEM 4
• Single piece exhaust manifold
• Poly-V belt
• 4 valve cross flow cylinder head
C6.6 ACERT
Specifications
C6.6
105x127 (4.1x5)
6.6 (1105)
505 (1113)
932 (37)
696 (27)
792 (31)
EPA Certified
Ship Weight (TA) kg (lbs)
Length mm (in)
Width mm (in)
Height mm (in)
9
C6.6 RATINGS
bkW bhp rpm
NA
88.7 119 2200
167.8 225 2200
186 250 2200
C Rating

3126
The 3126 offers three flywheel housings, two
turbocharger locations, four in-block dipstick
locations, and four oil pan configurations. You also
get optional oil filter locations, a single-belt water
pump drive, a right-hand starting motor that meets
SAE 1493 standards for safety, and a 45 bkW (60
bhp) gear-driven power takeoff capability.
Mechanically, the 3126 is built with strength and
precision for lasting performance. A one-piece,
stress-relieved cylinder block provides maximum
strength and durability with minimum weight.
Integrally cast cylinder bores and the traditional
Caterpillar deep-skirt cylinder block design resist
twisting and cracks.
Additional heavy-duty features include two-piece
articulated pistons with forged steel crown and cast
aluminum skirt, tapered connecting rods for
reduced shock loading and mechanical stress, and
roller cam followers located on an oscillating arm.
The camshaft is located high in the block, allowing
the use of shorter pushrods for reduced inertia and
more accurate valve timing.
3126B
Powerfully efficient and built to withstand the
toughest duty cycles, the 3126B includes three
unique engine components.
First, the torque limiting feature allows the torque to
be limited to a selected value (within limits) across
the lug curve via a switch input to the electronic
control module of the engine.
The second component is the top engine limit (TEL)
that limits speed along the engine lug curve that the
engine will not exceed. TEL allows for rating
flexibility without the need for special ratings or
iron.
The third unique component, power trim, allows an
OEM to adjust the lug curve vertically (relative to
speed) anywhere between -3 and +3 percent.
The engine also features the HEUI (Hydraulically
actuated Electronically controlled Unit Injector) fuel
system and ADEM™ III, an advanced electronic
control system. The 3126B meets EPA Tier 2 and EU
Stage II emissions.
3126 • 3126B D I E S E L S
10
3126 Fire Pump Engine
Specifications
3126 3126B
110 x 127 (4.33 x 5.0) 110 x 127 (4.33 x 5.0)
7.2 (442) 7.2 (442)
549 (1210) 588 (1295)
967 (38.07) 1078 (42.5)
674 (26.5) 798 (31.4)
923 (36.3) 862 (34.0)
3126 RATINGS In-Line 6
bkW bhp rpm bkW bhp rpm bkW bhp rpm bkW bhp rpm bkW bhp rpm
TA
160 215 2200 172 230 2200 179 240 2200 186 250 2200 190 255 2200
164 220 2400 172 230 2400 179 240 2400 190 255 2400 194 260 2400
— — — — — — 186 250 2500 186 250 2500 186 250 2500
— — — — — — 194 260 2600 194 260 2600 194 260 2600
3126B RATINGS In-Line 6**
bkW bhp rpm bkW bhp rpm bkW bhp rpm
ATAAC
131 175 2200- 149 200 1800- 187 250 1800-
2500 2100 2100
149 200 2200- 168 225 2200- 187 250 2200-
2500 2500 2500
— — — — — — 205 275 2100-
2400
— — — — — — 224 300 2100-
2400
EPA Certified
Abbreviations used:
• TA............Turbocharged/Aftercooled
• ATAAC ....Air-to-Air Aftercooled
• JWAC .....Jacket Water Aftercooled
* FM/UL Certified
** 3126B ratings Meet Tier 2, Stage II emissions requirements. Tier 2 refers to EPA (U.S.)
3126 FIRE PUMP RATINGS In-Line 6*
bkW bhp rpm
JWAC
145 195 1750
175 235 2100
186 250 2300
190 255 2400
201 270 2800
149 200 3000
Length mm (in)
Width mm (in)
Height mm (in)
A Rating B Rating C Rating D Rating E Rating
(Continuous) (Intermittent)
A Rating B Rating C Rating

Key Benefits:
Dependable : As its younger cousin the 3126B the C7
ACERT is built powerfully efficient to withstand the
toughest duty requirements. Tens of thousands of C7
ACERT are currently in use. Leveraging the same
reliable Cat 3126B technology, the C7 ACERT uses
features such as the HEUI fuel system. A waste-
gated turbocharger helps the C7 ACERT be more
responsive to load changes.
Leak Free : Lightweight block design and improved
joints throughout the engine help to dramatically
reduce oil and coolant loss from the engine. This
helps the environment as well.
Compact Design : The low profile of the new C7
ACERT allows for easy installation in OEM equipment.
Cleaner : The C7 ACERT has higher peak pressure in
the cylinder leading to improved thermal efficiency
and cleaner combustion. The monosteel piston and
matching ring pack allow for better oil control and
reduced blow-by. The waste-gated turbocharger
helps optimize airflow to the engine leading to a
cleaner combustion process.
Key Features:
• Enhanced cylinder block
• Oil pans
• Monosteel Piston
• Side Cover Breather
C7 ACERT
Specifications
C7 ACERT
Tier 3 Stage III a
C7
110 x 127 (4.33 x 5.0)
7.2 (439)
588 (1296)
1047 (42)
447 (30)
1059 (42)
Length mm (in)
Width mm (in)
Height mm (in)
C7 RATINGS In-Line 6**
ATAAC
130 175 2200- 149 200 2200- 186 250 1800-
2500 2500 2100
— — — 168 225 2200- 205 275 2100-
2500 2400
— — — — — — 224 300 2100-
2400
EPA Certified
Abbreviations used:
ATAAC .......Air-to-Air Aftercooled
** C7 ratings Meet Tier 3, Stage III A emissions requirements. Tier 3 refers to EPA (U.S.)
standards. Stage III A refers to European standards.
11

Designed with function and low emissions in mind,
the C-9 electronic diesel engine provides 205 to 250
bkW (275 to 335 bhp), rated 1800 to 2200 rpm, for
industrial applications.
The C-9 is an in-line, six-cylinder, air-to-air
aftercooled engine offering the Caterpillar exclusive
ADEM III (Advanced Diesel Engine Management)
electronic control system and innovative HEUI
(Hydraulically actuated, Electronically controlled Unit
Injector) fuel system.
The ADEM III electronic control module provides
faster response times, with added RAM and memory
capabilities, and enables the top engine limit to be
changed from 1800 to 2200 rpm. Additional flexibility
comes from a power trim feature that allows for
adjustments of +/- 3 percent.
The ADEM III electronic control module monitors
many engine functions and parameters, and it can
be programmed for warning, derate, or shutdown if a
problem arises. The ADEM III will be shared by all
Caterpillar in-line, six-cylinder industrial engines,
providing commonality for ease of installation in
OEM equipment.
The turbocharged, competitively priced C-9 meets
EPA Tier 2 and EU Stage II emission standards while
offering excellent performance, fuel economy,
reliability and durability. Due to its efficient
performance, the C-9 requires oil changes only once
every 500 hours of operation.
With improved power density, the C-9 has a smaller
envelope than the 3306, allowing for a
straightforward engine conversion in areas covered
by Tier 2 and Stage II emission standards.
The C-9 is built around a cast iron block with a deep
lower skirt that extends engine durability and life. An
integral oil cooler reduces weight, leaks and engine
width. High coolant and oil flow aid engine life, and
the elimination of a spacer plate means fewer
sealing joints and fewer leaks.
A mid-supported wet liner allows higher top piston
ring position for better fuel consumption and
reduced emissions. The high-strength, gray cast iron
liner has an induction-hardened internal surface that
provides extended life. And the liners are removable,
allowing for excellent rebuildability.
C-9 D I E S E L S
Specifications
C-9
12
C-9
112 x 149 (4.41 x 5.87)
8.8 (537)
776 (1710)
1198 (47.2)
819 (32.2)
1002 (39.5)
Length mm (in)
Width mm (in)
Height mm (in)
EPA Certified
Abbreviations used:
* C-9 ratings Meet Tier 2, Stage II emissions requirements. Tier 2 refers to EPA (U.S.)
C-9 AG RATING In-Line 6*
bkW bhp rpm
ATAAC
205 275 2200
224 300 2200
242 325 2200
C-9 RATINGS In-Line 6*
ATAAC
205 275 1800- 224 300 1800- 250 335 1800-
2200 2200 2200
— — — — — — 261 350 1800-
2200

Redesigned to conform to the new Tier 3 emission
regulations. The C9 ACERT gives you all the benefits
of the Tier 2/Stage II C-9 with the added advantage
of cleaner emissions. The C9 ACERT electronic
diesel engine provides 205 to 280 bkW (275 to 375
bhp), rated 1800 to 2200 rpm, for industrial
applications.
The C9 ACERT is an engine offering the most up to
date Caterpillar exclusive ADEM 4 (Advanced
Diesel Engine Management) electronic control
system and innovative HEUI (Hydraulically
actuated, Electronically controlled Unit Injector)
fuel system that have both proven highly efficient
through the test of time.
Key Benefits:
Decreasing Engine Wear : The new fractured-split
connecting rod is designed to create near perfect
joint alignment through the points of contact; it
maximizes and equalizes clamping force and rod
bearing life. The new oil filter has been
reconfigured to capture even smaller micro
particles than before, thus reducing wear.
Fuel Efficiency : Optimized fuel injector control
through leveraging the HEUI technology in Tier
2/Stage II C-9 and the added confidence in the
ADEM 4’s control capabilities. Mid-supported wet
liners allow higher piston ring position, which helps
lower fuel consumption, and decreases emissions.
Durability : The gray cast iron liner has an
induction hardened internal surface for extended
life and features a plateau honed surface for wear
reduction and excellent oil control.
Key Features:
• ADEM 4
• High Efficiency Oil Filters
• Fractured-Split Connecting Rod
• Light weight Cylinder Block
• Waste-gated Turbocharger
C9 ACERT
C9 ACERT
Tier 3 Stage III a
13
C9
112 x 149 (4.41 x 5.87)
8.8 (537)
776 (1711)
1198 (47)
819 (32)
1002 (40.0)
Specifications
EPA Certified
Abbreviations used:
* C9 ratings Meet Tier 3, Stage III a emissions requirements. Tier 3 refers to EPA (U.S.)
standards. Stage III refers to European standards.
Length mm (in)
Width mm (in)
Height mm (in)
C9 RATINGS In-Line 6*
bkW bhp rpm bkW bhp rpm bkW bhp rpm bkW bhp rpm
ATAAC
205 275 1800- 224 300 1800- 242 325 1800- 280 375 1800-
2200 2200 2200 2200
— — — — — — 261 350 1800-
2200
A Rating B Rating C Rating D Rating
(Continuous) (Intermittent) (Snow Groomer)

Big Horsepower in a Small Package
Caterpillar engine quality and product reliability have
come together with a new generation of electronic
engine controls in the Cat C-10 Air-To-Air Aftercooled
engine. With the highest horsepower/weight ratio in
the 10/11 liter-class, the 10.3-liter C-10 does the work
of much larger displacement engines without adding
excessive weight. Producing peak power of 425 bhp
at 2100 rpm, the C-10 weighs only 932 kg (2,050 lbs).
Torque on this rating peaks at 1325 lb-ft at 1400 rpm,
with a torque rise of 25 percent.
Improved Performance and Efficiency
The engine’s dual-microprocessor-based Electronic
Control Module (ECM) greatly increases the power
and flexibility of electronic diesel engine controls. The
ECM uses multiple sensors to constantly monitor
engine response and automatically make adjustments
to optimize performance.
Unlike mechanically controlled engines, the ECM
virtually eliminates engine speed variation and
automatically adjusts fuel delivery for cold starts,
rapid acceleration, and smoke reduction. The result is
improved acceleration response and greater fuel
efficiency.
Internal memory allows the ECM to store diagnostic
data for later inspection by a technician. The
diagnostic recorder function records engine operation
parameters for the time immediately preceding a fault,
and it continues to record for a few seconds after the
fault occurs. The service technician can then use the
information to make a more informed diagnosis.
Taking Charge of Engine Performance
Vast amounts of data are constantly collected by the
ECM and transformed into valuable and usable
information that can be monitored by the operator.
Two engine monitoring systems are available: the
Computerized Monitoring System (CMS), a vacuum
fluorescent display that transmits all engine
parameters over a two-wire system; and the Engine
Monitoring System (EMS), which displays key engine
and transmission parameters in both analog and
digital form. The EMS consists of multiple display
components, offering excellent installation flexibility.
C-10 D I E S E L S
Specifications
C-10
14
C-10
125 x 140 (4.9 x 5.5)
10.3 (629)
930 (2050)
1287 (50.7)
918 (36.1)
1078 (42.4)
ATAAC
231 310 1800- 250 335 1800- 272 365 1800- 291 390 1800- 317 425 1800-
2100 2100 2100 2100 2100
ATAAC (water-cooled exhaust)
— — — — — — 242 325 1800- 727 365 2100 — —
EPA Certified
Abbreviations used:
C-10 AG RATINGS In-Line 6*
bkW bhp rpm
ATAAC
272 365 2100
Length mm (in)
Width mm (in)
Height mm (in)

Key Benefits:
Higher Performance : Horsepower and Torque
optimized, plus the added benefit of a maintenance
counter and programmable alerts.
Noise Reduction : In the C11 ACERT, valve covers fully
isolate the base, which dampens the noise level.
Restructured gear train allows for smoother operation
within the engine leading to a reduction in decibel
output.
Fuel Economy : The C11 ACERT has longer oil change
intervals owed to a higher capacity oil pan and
increased sump capacity. Leak free design and
sealing accounts for next to none spillage. The C11’s
ACERT high-pressure fuel system allows for refined
performance with low emissions. MEUI’s multiple
injection strategy helps control fuel emissions with
precise metering.
The Brain Behind the Power : ADEM 4 the latest
version of Cat’s unique electronic engine control
system. The new ADEM 4 gives you more knowledge
of the inner workings and execution of your engine
capabilities. In addition ADEM 4 grants you more
control over engine performance. The C11 ACERT
comes standard with the ADEM 4 allowing for precise
fuel control. ADEM 4 continuously monitors your
engine parameters and adjusts accordingly; this
timing mechanism replaces all need for mechanical
timing units. ADEM 4 maintains your power even with
changing fuel temperature. Your C11 ACERT benefits
from the computer revolution.
Key Features:
• ADEM 4
• Cross flow cylinder head
• High pressure fuel system
• Mono Steel piston
• Leak free technology
C11 ACERT
Specifications
15
C11 ACERT
Tier 3 Stage III a
ATAAC
242 325 1800- 261 350 1800- 287 385 1800- 313 420 1800- 336 450 1800-
2100 2100 2100 2100 2100
EPA Certified
Abbreviations used:
* C-11 ratings Meet Tier 3, Stage III a emissions requirements. Tier 3 refers to EPA (U.S.)
C11
130 x 140 (5.12 x 5.51)
11.1 (677)
930 (2050)
1287 (51)
918 (36)
1078 (42)
Length mm (in)
Width mm (in)
Height mm (in)

Offering True Design Flexibility
The C-12 shares the same installation envelope as
the Cat C-10, giving OEM engineers unique design
flexibility. Only Caterpillar covers the 310 to 500
horsepower range with two engine displacements
that share the same dimensions, weight* and
electronics.
Caterpillar quality and reliability have come
together with a new generation of electronic
engine in the Cat C-12 industrial diesel. With the
highest horsepower/weight ratio in the 12 liter-
class, the 12L C-12 does the work of much larger
and heavier engines.
Improved Performance and Efficiency
and flexibility of electronic diesel engine controls.
The ECM uses multiple sensors to constantly
monitor engine response and automatically make
adjustments to optimize performance.
Unlike mechanically controlled engines, the ECM
virtually eliminates engine speed variation and
automatically adjusts fuel delivery for cold starts,
rapid acceleration, and smoke reduction.
Internal memory allows the ECM to store diagnostic
data for later inspection by a technician. The
diagnostic recorder function records engine
operation parameters for the time immediately
preceding a fault, and it continues to record for a
few seconds after the fault occurs.
Taking Charge of Engine Performance
Vast amounts of data are constantly collected by
the ECM and transformed into valuable and usable
information that can be monitored by the operator.
Two engine monitoring systems are available: the
Computerized Monitoring System (CMS), a vacuum
fluorescent display that transmits all engine
parameters over a two-wire system; and the Engine
Monitoring System (EMS), which displays key
engine and transmission parameters in both analog
and digital form. The EMS consists of multiple
display components, offering excellent installation
flexibility. Advanced electronic unit injectors
produce injection pressures above 25,000 psi for
better fuel economy and lower emissions. A
specially designed water pump provides a higher
flow rate for efficient cooling with more compact
radiators.
C-12 D I E S E L S
C-12
16
* The C-10 weighs 932 kg (2,050 lbs) and the C-12 weighs
940 kg (2,070 lbs). Engine weight will vary by arrangement.
C-12
130 x 150 (5.1 x 5.9)
12 (732)
939 (2070)
1287 (50.7)
918 (36.1)
1078 (42.4)
Specifications
ATAAC
276 370 1800- 298 400 1800- 317 425 1800- 339 455 1800- 373 500 1800-
2100 2100 2100 2100 2100
EPA Certified
Abbreviations used:
bkW bhp rpm
ATAAC
317 425 2100
Length mm (in)
Width mm (in)
Height mm (in)

Key Benefits:
Clean and Quiet : Using a combination of source
reductions, barriers, and various technological
platforms engine noise has become considerably
reduced. The gear train was redesigned with
increased capacity and decreasing noise volume in
mind. The extended option of a laminated front
housing significantly diminishes decibel output. Oil
pan isolation is crucial to sound reduction because
it prevents the pan from amplifying engine noise.
Reliability : C13 ACERT relies on proven C-12
technology. The single piece cylinder head design
has proven itself durable as well as reliable, with
thorough testing and use. There are tens of
thousands of C13 ACERT operating with the highest
efficiency all over the world. An hp to weight ratio
perfectly suited for most industrial segments helps
generate a high yield on investment. C13 ACERT
comes standard with a MEUI fuel system, which
has been proven reliable by thousands of satisfied
customers.
Durability : Multi-layered steel head gasket
improved durability on the C13 ACERT through
sealing, crush strength, creep resistance, and joint
stability. A steel spacer core sandwiched between
two layers of spring steel increases the head
gaskets resilience. Gasket resilience increases
engine life by decreasing leakage.
Easy Maintenance : C13 ACERT has the industry
standard, 500-hour oil change intervals. C13 ACERT
minimizes your operating costs by utilizing the same
oil that Tier 2/Stage II engines currently use. C13
ACERT is equipped with a new highly efficient oil
filter (based on Cat’s hydraulic technology). The
new filter reduces engine wear and enhances
contamination control.
Key Features:
• ADEM 4
• Oil filter
• Mono steel piston
• Connecting rod
• Cylinder block
C13 ACERT
17
C13 ACERT
Tier 3 Stage III a
C13
130 x 157 (5.1 x 6.2)
13 (793)
930 (2050)
1287 (51)
918 (36)
1078 (42)
Specifications
ATAAC
287 385 1800- 309 415 1800- 328 440 1800- 354 475 1800- 388 520 1800-
2100 2100 2100 2100 2100
EPA Certified
Abbreviations used:
standards. Stage III a refers to European standards.
Length mm (in)
Width mm (in)
Height mm (in)

The Cat 3406 is an in-line, six-cylinder diesel built to
last, with major components offering an
exceptionally high strength-to-weight ratio. With
power ratings from 199–392 bkW (267–525 bhp), this
hard-working powerhouse offers reliable power for
a wide range of heavy-duty applications.
Lasting Performance is Built In
The one-piece cylinder heads resist twisting and
flexing that can cause head gasket problems and
coolant leaks. A steel spacer between the head
and block eliminates the need for liner
counterbores, greatly enhancing the strength and
fatigue life of the block.
The forged steel crankshaft is uniquely heat-treated
in a process developed and patented by Caterpillar.
Then it is dynamically balanced and super-finished.
The crankshaft’s high fatigue strength means it can
be reground up to three times.
Hard-faced intake and exhaust valves resist wear
at high heat, while the chrome-plated stems help
guard against seizure. Valves rotate three degrees
each lift, assuring good seating and uniform
temperature distribution.
Simplified Service and Maintenance
The direct injection fuel system uses adjustment-
free injection nozzles. Spin-off fuel and lube filters
and clamp-on air filters speed routine maintenance
procedures.
3406 D I E S E L S
3406
18
Specifications
3406
137 x 165 (5.4 x 6.5)
14.6 (893)
1356 (2990)
1661 (65.4)
901 (35.5)
1336 (52.6)
3406 RATINGS In-Line 6
T
201 270 1800 224 300 2000 242 325 2100 283 380 2100 291 390 2100
TA
199 267 1300 — — — 199 267 1300 — — — — — —
205 275 1800 242 325 2000 269 360 2100 313 420 2100 336 450 2100
242 325 1800 242 325 2000 242 325 1800 — — — — — —
— — — — — — 242 325 2100 — — — — — —
242 325 1800 276 370 2000 298 400 2100 358 480 2100 373 500 2100
257 345 1800 254 340 2000 250 335 2100 — — — — — —
— — — — — — 257 345 1800 — — — — — —
— — — — — — 269 360 1800 283 380 2100 291 390 2100
268 360 1800 268 360 2000 269 360 2100 298 400 2100 324 435 2100
— — — — — — 280 375 2000 — — — — — —
— — — — — — 280 375 2100 — — — — — —
— — — — — — 298 400 1800 — — — — — —
— — — — — — 298 400 2000 — — — — — —
280 375 1800 291 390 2000 298 400 2100 324 435 2100 362 485 2100
— — — — — — 321 430 2100 — — — — — —
— — — — — — 328 440 1800 — — — — — —
— — — — — — 328 440 1900 366 490 2100 — — —
— — — — — — 328 440 2000 — — — 384 515 1900
287 385 1800 328 440 2000 343 460 2100 373 500 2100 384 515 2100
313 420 1800 328 440 2000 343 460 2100 384 515 2100 392 525 2100
Abbreviations used:
PC...............Precombustion Chamber
3406 FIRE PUMP RATINGS In-Line 6
1460 rpm 1750 rpm 1900 rpm 2100 rpm 2200 rpm 2300 rpm
bkW bhp bkW bhp bkW bhp bkW bhp bkW bhp bkW bhp
T
183 247 218 292 233 312 246 330 — — 261 350
242 325 276 370 280 375 280 375 — — — —
TA
224 300 313 420 317 425 321 430 — — 339 455
— — 343 460 343 460 360 483 — — — —
Ship Weight (TA) kg (lbs)
Length mm (in)
Width mm (in)
Height mm (in)

Offering True Design Flexibility
The Cat C-15 brings together some of the best
benefits of advanced electronic controls with pure
power to get the job done efficiently. More than 100
billion on-highway miles have proven this 14.6 liter
workhorse. And it keeps proving itself day after day
in dozens of applications around the world.
The C-16 shares the same installation envelope as
the Cat C-15, giving OEM engineers unique design
flexibility. Only Caterpillar covers the 317-492 bkW
(425-660 bhp) range with two engine displacements
that share the same dimensions, weight, and
electronics.
Reliability and Durability Through Innovation
A patented pendulum absorber improves engine
reliability and performance by absorbing Electronic
Unit Injector (EUI) torque pulses (the shock loads
created by the EUI injections) before they can travel
back through the gear train.
More Power When You Need It
The C-15 and C-16 develop constant horsepower
between 1800 rpm and 2100 rpm. Engine rated
speed can be programmed between 1800 and 2100
rpm depending on the rating.
The Power of Advanced Electronics
and flexibility of electronic diesel engine controls.
The ECM uses multiple sensors to constantly
monitor engine response and automatically make
adjustments to optimize performance. Unlike
mechanically controlled engines, the ECM virtually
eliminates engine speed variation and automatically
adjusts fuel delivery for cold starts, rapid
acceleration, and smoke reduction. The result is
efficiency.
Unmatched Information Management Technology
The standard electronics package provides a low-
cost alternative to expensive add-on recording
devices. Using standard data links, the user can
access valuable engine operating data through a
special service tool or an optional display.
C-15 • C-16 D I E S E L S
C-16
19
Specifications
C-15 C-16
137 x 165 (5.4 x 6.5) 140 x 171 (5.5 x 6.75)
14.6 (893) 15.8 (964)
1332 (2937) 1332 (2937)
1661 (65.4) 1661 (65.4)
901 (35.5) 901 (35.5)
1336 (52.6) 1336 (52.6)
ATAAC
373 500 1800- 410 550 1800- 447 600 1800- 469 630 1800- 492 660 1800-
2100 2100 2100 2100 2100
EPA Certified
Abbreviations used:
* C-15 and C-16 ratings Meet Tier 2, Stage II emissions requirements. Tier 2 refers to EPA (U.S.)
bkW bhp rpm
ATAAC
447.5 600 2100
ATAAC
317 425 1800- 336 450 1800- 354 475 1800- — — — — — —-
2100 2100 2100 — — — — — —
— — — — — — 392 525 1800- 421 565 1800- 429 575 1800-
2100 2100 2100
ATAAC (water-cooled exhaust)
— — — — — — — — — 373 500 1800- — — —
2100
SCAC (water-cooled exhaust)
— — — — — — — — — 373 500 1800- — — —
2100
bkW bhp rpm
ATAAC
391 525 2100
Length mm (in)
Width mm (in)
Height mm (in)

Key Benefits:
ADEM : The ADEM 4 the latest version of Cat’s
unique electronic engine control system. The new
ADEM 4 gives you more knowledge of the inner
workings and execution of your engine capabilities.
In addition ADEM 4 grants you more control over
engine performance. The C15 ACERT comes
standard with the ADEM 4 allowing for precise fuel
control. ADEM 4 continuously monitors your engine
parameters and adjusts continuously; this electrical
timing replaces all need for mechanical timing
units.
Lasting Performance : Very few changes from the
highly reliable Tier 2/ Stage II C-15 engine. C15
ACERT has excellent power density, although
slightly heavier than the Tier 2/Stage II C-15, it
packs enough power to balance the equation. The
C15 ACERT enjoys a three percent increase in
power over the Tier 2/Stage II model.
Decreased Oil Consumption : The Monotherm piston
has tighter tolerance and narrow rings that conform
to its liner for superior oil control. The plateau-
honed liner provides deep grooves that retain oil
better to minimize oil consumption and wear.
Durable Workhorse : Continuously evolving from its
roots as a 3406, the C15 ACERT benefits from
millions of hour of operation. It has the same robust
power band performance from 1800 to 2100 RPMs,
exhibits excellent fuel consumption for Tier 3/Stage
III when operated at 1800 RPM. C15 ACERT is
extremely responsive with a fast spinning waste-
gated turbo.
Key Features:
• ADEM 4
• Oil filter
• Mono steel piston
• Connecting rod
• Cylinder block
C15 ACERT
C15 ACERT
Tier 3 Stage III a
20
C15
137 x 171 (5.39 x 6.73)
15.2 (928)
1332 (2937)
1661 (65)
901 (36)
1336 (53)
Specifications
ATAAC
328 440 1800- 354 475 1800- 403 540 1800- 433 580 1800- 444 595 1800-
2100 2100 2100 2100 2100
EPA Certified
Abbreviations used:
Length mm (in)
Width mm (in)
Height mm (in)

Key Benefits:
High Performance : The C18 ACERT has best in class
ranking for power density. The C18 ACERT has a
large displacement and more performance for your
money; only one installation is necessary for a wide
power range. It has more power when you need it,
with constant horsepower between 1800 and 2100
rpms. The C18 ACERT is considerably lighter than the
3412E and 3408E, it replaces up to 700 HP combined
with improved ease of packaging due to its in-line
design. The highest ratings use a unique twin
parallel turbo design providing superb response with
miserly fuel consumption. The lower ratings utilize a
single turbo design. 500-hour oil change periods
minimize owner-operating costs.
Fuel Economy : Improved fuel efficiency gives
savings in operating costs, while providing cleaner
air. Fuel efficiency is provided through timely
injections by MEUI, better air ratio through twin
panel turbocharger, and superior control with the
tighter tolerance and narrow rings of a Monotherm
piston.
The Brain Behind the Power : ADEM 4 has extensive
torque capacity; it allows for customizing engine
speed, switching control speed changes, and
controlling idle levels. Speed control is established
through ADEM 4 controlling the fuel input. It
includes a remote shut down and its password
protected. Everything a machine needs.
High Reliability : The original mechanical electronic
unit injector fuel system is highly reliable due to its
proven design and the shear volume of units active
in the market. The enhancements made on the fuel
system have been tested from the early stages of
development to improve engine reliability. The C18
ACERT uses new connecting rods drilled with forced
lubrication to the piston area and four bolts for
better retention and clamping force.
Key Features:
• ADEM 4
• Twin Parallel Turbocharger
• Best in power class density
• Mechanical Electrical fuel system
• Monotherm piston
C18 ACERT
C18 ACERT
Tier 3 Stage III a
21
C18
145 x 183 (5.71 x 7.2)
18.1 (1105)
1332 (2937)
1661 (65.4)
901 (35.5)
1336 (52.6)
Specifications
ATAAC
429 575 1800- 470 630 1800- 522 700 1800- 570 765 1800- 585 785 1800-
2100 2100 2100 2100 2100
EPA Certified
Abbreviations used:
Length mm (in)
Width mm (in)
Height mm (in)

3408 Diesel
With ratings from 238–399 bkW (319–535 bhp), the
Cat 3408 offers all the power and performance you
need for a wide range of heavy-duty applications.
Strong, flexible and reliable, this V-8 diesel delivers
consistent performance and excellent fuel
economy over the entire operating range.
Trouble-Free By Design
Head gasket problems and coolant leaks are
minimized by one-piece cylinder heads that resist
twisting and flexing. The steel spacer between the
head and block eliminates the need for liner
counterbores, greatly enhancing the strength and
fatigue life of the block.
Advanced manufacturing techniques also
contribute to the strength and performance of this
powerhouse. A heat-treating process developed
and patented by Caterpillar produces a forged steel
crankshaft of exceptional strength and durability.
This high fatigue strength allows the crankshaft to
be reground up to three times.
Hard-faced intake and exhaust valves resist wear
at high heat, while the chrome-plated stems help
guard against seizure. Valves rotate three degrees
with each lift, assuring good seating and uniform
temperature distribution.
The direct injection fuel system uses adjustment-
free injection nozzles. Spin-off fuel and lube filters
as well as clamp-on air filters speed routine
maintenance procedures.
3412 Diesel
Like the 3406 and 3408, the 3412 is designed and
built with one goal in mind: the highest possible
performance, durability, and fuel economy in tough,
heavy-duty applications. The 12-cylinder 3412
delivers from 317–716 bkW (425–960 bhp), with all
the strength and assurance of its smaller cousins.
Many of the same design features help keep
productivity up, and repair and maintenance time to
a minimum. The only question: Which model is best
for your application?
3408 • 3412 D I E S E L S
3412
22
Specifications
3408 3412
137 x 152 (5.4 x 6.0) 137 x 152 (5.4 x 6.0)
18.0 (1099) 27.0 (1649)
1497 (3300) (T) 2205 (4420) (TA)
1590 (62.6) 2092.4 (82.38)
1231 (48.5) 1302.5 (51.28)
1376 (54.2) 1447.2 (56.98)
3408 RATINGS V-8
T
242 325 1800 272 365 2000 317 425 2100 339 455 2100 358 480 2100
TA
238 319 1200 — — — 261 350 1200 — — — — — —
347 465 1800 366 490 2000 377 505 2100 392 525 2100 399 535 2100
347 465 1800 366 490 200 377 505 2100 392 525 2100 399 535 2100
3412 RATINGS V-12
T
354 475 1800 384 515 2000 429 575 2100 522 700 2100 552 740 2100
373 500 1800 410 550 2000 485 650 2100 503 675 2100 522 700 2100
TA
317 425 1200 — — — 399 535 1300 — — — — — —
533 715 1800 552 740 2000 559 750 2100 656 880 2100 716 960 2100
418 560 1800 — — — 559 750 2100 656 880 2100 716 960 2100
TTA
533 715 1800 541 725 2000 559 750 2100 — — — — — —
EPA Certified
Abbreviations used:
TTA.............Twin Turbocharged/Aftercooled
PC...............Precombustion Chamber
Length mm (in)
Width mm (in)
Height mm (in)

Power on Demand
In applications around the world, the 3412E have
proven themselves to be reliable, efficient power
sources. With the addition of advanced electronic
controls, these hard working diesels become even
more productive, dependable, and economical.
With power ratings from 317-783 bkW (425-1050
bhp), the 3412E muscles its way to the top of the
Caterpillar electronic engine family.
The Electronic Control Advantage
The dual-microprocessor-based Electronic Control
Module (ECM) greatly increases the power and
flexibility of electronic diesel engine controls. The
ECM uses multiple sensors to constantly monitor
engine response and automatically make
adjustments to optimize performance. Unlike
mechanically controlled engines, the ECM virtually
eliminates engine speed variation and automatically
adjusts fuel delivery for cold starts, rapid
acceleration, and smoke reduction. The result is
efficiency.
When Your Engine Talks, Listen
The standard electronics package provides a low-
cost alternative to expensive add-on recording
devices. Using standard data links, the user can
access valuable engine operating data through a
special service tool or an optional display. This
information can also be downloaded to a PC-based
information management system available from
your Cat dealer.
Hydraulically Actuated Electronically Controlled
Unit Injector Fuel System
Working hand-in-hand with electronic controls is
the HEUI system, a major breakthrough in fuel
system technology. HEUI offers improved fuel
economy and emissions control by providing more
efficient combustion with higher fuel injection
pressures at lower engine rpm. The injectors need
no adjustment and eliminate the need for high-
pressure fuel lines and their connectors on the
outside of the engine.
3412E D I E S E L S
3412E
23
3412E
137.2 x 152.5 (5.4 x 6.0)
27 (1649)
2436 (5365) (TA)
1995 (78.6)
1496 (58.9)
1483 (58.4)
EPA Certified
Abbreviations used:
JWTA.........Turbocharged/Aftercooled
JWTTA.......Twin Turbo Aftercooled
* 3412E ratings Meet Tier 2, Stage II emissions requirements. Tier 2 refers to EPA (U.S.)
3412E RATINGS V-12
TA (JWAC)
— — — 485 650 2000 485 650 1800 — — — — — —
— — — — — — 485 650 2100 — — — — — —
— — — 507 680 2000 522 700 1800 — — — — — —
— — — — — — 522 700 2100 597 800 2100 — — —
— — — 544 730 1800
— — — 559 750 2100
TTA (JWAC)
451 605 1800 317 425 1200 429 575 1300 — — — — — —
485 650 1800 373 500 2100 522 700 1800 — — — — — —
522 700 1800 466 625 1400 522 700 2100 — — — — — —
548 735 1800 522 700 2000 559 750 1800 — — — — — —
— — — 560 750 2000 559 750 2100 — — — — — —
— — — 567 760 2100 641 860 2100 708 950 2100 783 1050 2100
— — — 597 800 2100 671 900 2100 746 1000 2100 — — —
— — — 611 820 2100 — — — — — — — — —
TTA (ATAAC)*
485 650 2100 — — — — — — — — — — — —
522 700 2100 — — — — — — — — — — — —
Specifications
Length mm (in)
Width mm (in)
Height mm (in)

Cat 3500 engines (3508, 3512, and 3516) are the
best-selling power units of their size in the world.
One reason is their design simplicity. We build them
to be easy to install, maintain, and service.
Service Efficiency Reduces Operating Costs
Consider service access. Two inspection openings
per cylinder make it easy to get at everything from
the camshaft to the main bearings. Individual
cylinder heads let you open up and work on a
single cylinder.
To minimize parts inventory and potential assembly
errors, we build 3500 engines with many common
parts. For example, intake and exhaust valves,
valve seat inserts, and valve springs are all
identical.
Superior Fuel Economy
Cat 3500 engines incorporate several proven fuel-
saving design features such as four-stroke cycle
design, unit fuel injectors and four valves per
cylinder. Additional savings are provided by
performance-matched turbochargers and charge-
air cooling.
At the factory, we set individual scroll-type unit
injectors for consistent, precise fuel delivery to
each cylinder. Fuel is injected at 1240 bar (18 000
psi) for superior atomization. And by producing
injection pressure at the cylinder, high-pressure
fuel lines are eliminated.
In competitive testing, Cat 3500s are typically five to
15 percent more fuel efficient than other same-
class engines. In one test that pitted a 3512 against
an identically rated competitive engine, the Cat
engine burned 6.5 percent less fuel. After 5000
hours of operation, the 3512 would have saved 56
800 liters (15 000 gallons) of fuel.
Savings at Repower Time
The high efficiency of 3500s makes them a very
attractive repowering alternative. This is especially
true when you consider the cost of repairing and
overhauling an old, inefficient engine. Count on
3500 engines to deliver higher production with less
fuel consumption.
3500 D I E S E L S
3512
24
Specifications
3508 3512 3516
170 x 190 (6.7 x 7.5) 170 x 190 (6.7 x 7.5) 170 x 190 (6.7 x 7.5)
34.5 (2105) 51.8 (3158) 69 (4210)
4318 (9500) 6091 (13 400) 6713 (14 800)
2136 (84.1) 2676 (105.4) 3366 (132.5)
1703 (67.0) 1703 (67.0) 1703 (67.0)
1720 (67.7) 1720 (67.7) 1718 (67.6)
3508 RATINGS V-8
TA
507 680 1200 — — — 612 820 1300
578 775 1800 — — — 634 850 1800
638 855 1800 697 935 1800 746 1000 1800
FIRE PUMP RATINGS
1460 rpm 1750 rpm
bkW bhp bkW bhp
TA
709 950 794 1065
FIRE PUMP RATINGS
1460 rpm 1750 rpm
bkW bhp bkW bhp
TA
1067 1430 1193 1600
FIRE PUMP RATINGS
1460 rpm 1750 rpm
bkW bhp bkW bhp
TA
1417 1900 1480 1985
3512 RATINGS V-12
TA
761 1020 1200 — — — 858 1150 1300
877 1175 1800 — — — 1007 1350 1800
955 1280 1800 1048 1405 1800 1119 1500 1800
3516 RATINGS V-16
TA
1011 1355 1200 — — — 1242 1665 1300
1156 1550 1800 — — — 1268 1700 1800
1275 1710 1800 1391 1865 1800 1492 2000 1800
Abbreviations used:
Length mm (in)
Width mm (in)
Height mm (in)

3500B engines feature mechanical enhancements
and advanced electronic control systems that
combine to offer significant improvements in fuel
efficiency and emissions control, while increasing
horsepower ratings and improving responsiveness.
All ratings are optimized for fuel efficiency while
meeting Tier 1/Stage I emissions. The Electronic
Control Module (ECM) controls the 3500B engines
by collecting operating condition information from
engine sensors, analyzing that information, and
constantly adjusting injection timing and duration to
optimize fuel efficiency and reduce emissions. This
level of control is also responsible for the engine’s
virtually smokeless operation – even during startup
and rapid acceleration.
Larger camshafts provide increased injection
pressure and shorter injection duration. New,
electronically controlled unit injectors improve fuel
atomization and injection timing pressure. A new
deep-crater piston design helps increase
turbulence in the combustion chamber for better
air/fuel mixing. Reduced crevice volume minimizes
wasted charge air. Cooler aftercooler water
temperature and streamlined exhaust manifolds
also contribute to engine efficiency.
Electronic Advantage
Electronic control provides engine protection. Three
protection strategies – alarms, deratings, and
shutdowns – are programmable by the equipment
operator to help prevent serious downtime
incidents without interfering with safe machinery
operation. With the derating feature selected, the
engine will automatically derate itself gradually in
steps as little as 2-3 percent if it enters a dangerous
operating zone resulting from air inlet restriction,
insufficient cooling, high exhaust temperature,
overspeed, or any other cause. Automatic derating
does not occur if the operator reacts first to move
the engine out of the dangerous operating zone.
3500B D I E S E L S
3516B
25
3508B 3512B 3516B
170 x 190 (6.7 x 7.5) 170 x 190 (6.7 x 7.5) 170 x 190 (6.7 x 7.5)
34.5 (2107) 51.8 (3158) 69 (4209)
4188 (9101) 5670 (12 500) 7484 (16 500)
2462 (97) 3067(120.8) 3008 (118.4)
1703 (67) 1785 (70.3) 1443 (56.8)
1720 (68) 1806 (71.1) 1980 (77.9)
Specifications
3508B RATINGS V-8
TA
746 1000 1800 783 1050 1800 820 1100 1800
3512B RATINGS V-12
TA
1119 1500 1800 1175 1575 1800 1231 1650 1800
3516B RATINGS V-16
TA
1492 2000 1800 1566 2100 1800 1641 2200 1800
EPA Certified
Abbreviations used:
Length mm (in)
Width mm (in)
Height mm (in)

Since their introduction in 1985, 3600 engines (3606,
3608, 3612, and 3616) have delivered more than five
million working hours in wide-ranging equipment
and industrial applications. Many customers are
repeat buyers, indicating that 3600 engines meet
and exceed expectations.
Confidence to Run Harder and Work Longer
Available in in-line 6- and 8-cylinder configurations
and V-12 and V-16 models, Cat 3600 engines feature
a one-piece block casting of heavily ribbed,
weldable gray iron. The intake plenum runs the full
engine length, providing even air distribution to the
cylinders. The crankshaft is a press forging that is
induction hardened and regrindable. Bearings are
steel-backed aluminum with a copper-bonded,
lead-tin overlay for longer life.
Cylinder liners are high alloy iron castings, water-
jacketed over their entire length. Pistons are two-
piece, with a steel crown for strength and an
aluminum skirt to reduce weight. Both cylinder
liners and pistons are designed for 80 000 hours
using No. 2 fuel.
Overall, 3600 engines are designed to run 40 000
hours between major overhauls, and 20 000 hours
between minor overhauls using No. 2 fuel.
A New Standard for Fuel Efficiency
Cat 3600 engines put 45 percent of the heat
generated to work, a dramatic increase over the
engineering “rule of thumb” of 30 percent. Brake-
specific fuel consumption of the engine with two
water pumps, a fuel pump and an oil pump is as low
as 187 g/bkW-hour (0.307 lb/bhp-hour).
3600 D I E S E L S
3612
26
3606 3608
280 x 300 (11 x 11.8) 280 x 300 (11 x 11.8)
110.8 (6764) 147.8 (9018)
15 680 (34 500) 19 000 (41 800)
3988 (157) 4828 (190)
1748 (69) 1748 (69)
2626 (103) 2626 (103)
3612 3616
280 x 300 (11 x 11.8) 280 x 300 (11 x 11.8)
221.7 (13 527) 295.6 (18 036)
25 140 (55 300) 29 950 (65 900)
4562 (180) 5482 (216)
1704 (67) 1704 (67)
3231 (127) 3231 (127)
Specifications
bkW bhp rpm
TA
1490 1998 750
1560 2092 800
1730 2319 900
1850 2481 1000
3612 RATINGS V-12
bkW bhp rpm
TA
2980 3996 750
3120 4184 800
3460 4640 900
3700 4962 1000
3616 RATINGS V-16
bkW bhp rpm
TA
3960 5310 750
4160 5579 800
4600 6169 900
4920 6598 1000
bkW bhp rpm
TA
1980 2655 750
2080 2787 800
2300 3080 900
2460 3300 1000
Abbreviations used:
Length mm (in)
Width mm (in)
Height mm (in)
Length mm (in)
Width mm (in)
Height mm (in)
Distillate
A Rating
(Continuous)
Distillate
A Rating
(Continuous)
Distillate
A Rating
(Continuous)
Distillate
A Rating
(Continuous)

Performance Without Compromise . . . On Any Fuel
The decision to use heavy-fuel-burning engines is
complex and often difficult to make. But when you
choose a member of the Cat 3600 engine family, you
can count on thousands of hours of trouble-free
performance and the lowest possible operating
costs. That was the goal when Caterpillar began
research into heavy-fuel alternatives, and it remains
the guiding principle today as Cat heavy-fuel
engines work around the world.
Made Better by Design, Proven by Research
In addition to research into heavy-fuel performance,
Caterpillar has conducted extensive research into
the characteristics of heavy fuel. By the time the
engines went into production, we knew exactly how
heavy fuel affected an engine’s performance and
durability.
We tested 3600 engine performance on fuels with
viscosities up to 700 dSt (at 50° C), the consistency
of tar. To simulate the poorest commercially
available fuel, we added 5 percent sulfur and 600
ppm of vanadium. After 10 years and 80,000 hours of
testing distillate and heavy fuels, the Cat heavy-
fuel-burning 3600 engines were ready for release.
State-Of-the-Art Componentry for Heavy Fuel Use
The following special components enhance
component life and enable these engines to run
efficiently and economically on the heaviest fuel
available.
• Fuel injectors optimized for high-viscosity fuel
• Cooling for fuel injector nozzle tips
• Flange-cooled cylinder liners
• Ceramic-coated nimonic 80A exhaust valves
• Water-cooled valve inserts
• High mass flow turbochargers
• Turbocharger water wash
• Remote-mounted, heated fuel filter
Flexibility for the Future
By substituting parts, typically at overhaul time, you
can convert 3600 engines from distillate to heavy-
fuel configurations, and vice versa. The 3600 family
of engines can also burn crude oil, with engine
ratings dependent upon fuel characteristics.
Generally, these ratings fall between those for
distillate and heavy fuel.
3600 H E A V Y F U E L E N G I N E S
3616
27
3606 3608
280 x 300 (11 x 11.8) 280 x 300 (11 x 11.8)
110.8 (6764) 147.8 (9018)
15 680 (34 500) 19 000 (41 800)
3988 (157) 4828 (190)
1748 (69) 1748 (69)
2626 (103) 2626 (103)
3612 3616
280 x 300 (11 x 11.8) 280 x 300 (11 x 11.8)
221.7 (13 527) 295.6 (18 036)
25 140 (55 300) 29 950 (65 900)
4562 (180) 5482 (216)
1704 (67) 1704 (67)
3231 (127) 3231 (127)
Specifications
bkW bhp rpm
TA
1350 1810 750
1355 1817 825
1570 2105 900
1680 2253 1000
3612 RATINGS V-12
bkW bhp rpm
TA
2700 3621 750
2710 3634 825
3140 4211 900
3360 4506 1000
3616 RATINGS V-16
bkW bhp rpm
TA
3600 4828 750
3600 4828 825
4180 5605 900
4480 6008 1000
bkW bhp rpm
TA
1800 2414 750
1800 2414 825
2090 2803 900
2240 3004 1000
Abbreviations used:
Length mm (in)
Width mm (in)
Height mm (in)
Length mm (in)
Width mm (in)
Height mm (in)
Heavy Fuel
A Rating
(Continuous)
Heavy Fuel
A Rating
(Continuous)
Heavy Fuel
A Rating
(Continuous)
Heavy Fuel
A Rating
(Continuous)

Gaseous Fuel Engines
28
Clearing the Air About Emissions
As concern for air quality grows,
governments and municipalities
everywhere are enacting new laws to
curb emissions from burning fossil
fuels. This trend has made cleaner
burning gas engines more attractive than
ever before.
In some areas and applications, a regional
abundance of low-cost gases, coupled with
the inherent combustion efficiency of
gaseous fuels, make the economic benefits
of gas engines as attractive as their low
emissions.
Engineering That’s Ahead of Its Time
Caterpillar developed its first gas-powered
engines more than 50 years ago, leveraging
the quality engineering and manufacturing of
its diesel engines to produce equally high
performance and economy for a new
segment of the industrial market. Because
gas engines satisfy the need for emission
control without sacrificing efficiency and
economy, they have become the power
source of choice for more and more users
and applications.
You Choose the Most Economical Fuel
Unlike diesel fuel engines, Cat gas engines let
you choose the most economic gaseous fuel.
Natural, field, landfill, and propane gas can all
be burned efficiently. Digester and other
manufactured gases, many of which are free
by-products of other processes, can also be
used in some applications.
Meeting the Challenge of Lower Emissions
Specific Cat gas engine packages currently
achieve emissions within the limits set by the
world’s strictest air quality boards, including
the United States, EPA, Europe’s TA Luft, and
the Environmental Agency of Japan.
Achieving this level of performance requires
leaner combustion without sacrificing power.
The open chamber design, available on
engines through 1,340 bhp, was engineered
by Caterpillar to meet the challenge.
The larger G3600 family, along with specially
designed, gallery-cooled deep cup pistons for
fast, efficient combustion, uses a state-of-the-
art, electronically controlled pre-chamber
design to obtain NOx levels as low as 0.5
gr/bhp-hr.
Technical Advantages Make the Economics
Even Better
No matter what fuel you choose, Cat gas
engines will get the most out of it. At the heart
of the high performance of all Cat gas engines
through 1,340 bhp is a simple open-chamber
design. This open-chamber combustion, along
with the specially designed pistons, low
overlap cams, and an air induction system
that keeps the air-fuel mixture lean, serves to
increase power while minimizing NOx.
Electronic Controls for Reliability and
Efficiency
The Cat Electronic Ignition System (EIS) is
specifically designed to provide a highly
reliable and durable ignition system for
industrial engines. EIS employs state-of-the-
art microprocessor technology to control key
parameters such as timing, detonation
protection, duel fuel switching, and various
timing maps that enhance engine
performance. It also has built-in diagnostics
that cover nearly every facet of the ignition
system.
To you, this advanced technology means
unbeatable reliability and fuel efficiency with
whatever gaseous fuel you choose.
Unbeatable Versatility
Cat gas engine packages can be tailored to
your specific application or site-specific
requirements.
For example, special hardware and
components are available for landfill
applications and sites where only low-
pressure gas supplies are available. Naturally
aspirated or turbocharged and aftercooled
options allow you to match emissions and
dependability requirements to your specific
needs. Cat gas engines are also ideal for
cogeneration, chillers, air compressors, water
pumps, and a variety of industrial processes.
With operating ranges from 900 to 1800 rpm,
you’ll find a comfortable match for any
equipment you need to drive.
Diesel Strength is Built In
No matter which model of Cat gas engine you
choose, you can rest assured that you will
benefit from the same legendary
performance, economy and value that have
built on the Caterpillar worldwide reputation.
One good example is the fact that Cat gas
engines are built on diesel engine frames.
That means greater reliability, lower
maintenance and repair costs, and longer
service life. Components such as blocks,
crankshafts, heads, liners, and connecting
rods are also common with Cat diesel
engines.
A Choice of Aspiration Methods
Although emission regulations are increasing
the use of turbocharged and aftercooled
engines, many still choose naturally aspirated
gas engines for their reliability and low
maintenance characteristics. Less
supervision makes it possible to operate Cat
gas engines in very remote areas of the world
with complete confidence.
Electronic Ignition System
circuit board
G3600 Cylinder Head Cutaway

G3300 • G3400 E N G I N E S
29
G3300 Family
The smallest members of the Cat gaseous engine
family are the G3300s, offering horsepower ratings
from 71-164 bkW (95-220 bhp) in four- and six-cylinder
configurations. All provide proven, heavy-duty diesel
performance in a wide range of commercial and
industrial applications. Combine performance with
high fuel efficiency for years of value.
Like all Cat gaseous fuel engines, the 3300s utilize
major components from their diesel counterparts,
including blocks, crankshafts, heads, camshafts, and
connecting rods. With firing pressures running 40 to
50 percent less than diesel, these components deliver
significantly longer life.
The G3300s are the power of choice in petroleum,
building services, irrigation, and electrical generation.
G3400 Family
The Caterpillar G3400 family of natural gas engines is
designed to operate over a range of speeds to serve
the widest possible range of applications. All G3400
engines are built on the world-renowned Cat diesel
frame, making possible higher running speeds, lower
life-cycle costs, and greater fuel efficiencies.
Caterpillar Engines to the Core
Advanced engineering and manufacturing make Cat
G3400 engines versatile and efficient powerhouses
with a wide operating range and a wide range of fuel
options. Among the power-producing features are
deep-cut, galley-cooled, 3-ring aluminum pistons;
specially designed camshafts; and matched
turbochargers.
Electronics Mean Control
By marrying advanced microprocessor technology to
advanced engine design, Cat engineers have brought
gas engine productivity to new levels of production.
From Detonation Sensitive Timing sensors to the
Electronic Control Module, the G3412C LE has the
control needed to deliver up to 6 percent greater
horsepower with superior fuel economies and lower
emissions.
When the demand is for “around-the-clock,” year-in
year-out service under the most difficult
circumstances, Cat G3400 gaseous fuel engines are
the natural choice.
G3306G3412C
1
32° C/90° F Water to Aftercooler
2
3
Low Emissions
Abbreviations used:
Rating Definition
Continuous: Output available without
varying load for an unlimited time.
Continuous power in accordance with
ISO8528, ISO3046/1, AS2789, DIN6271, and
BS5514.
G3300 RATINGS
1800 rpm
bkW bhp
G3304 NA 71 95
G3306 NA 108 145
G3306 T 112 150
G3306 TA2
151 203
G3306 TA1
164 220
G3400 RATINGS
1800 rpm 1400 rpm
bkW bhp bkW bhp
G3406 NA 160 215 — —
G3406 TA1
218 292 — —
G3406 TA2
242 325 187 250
G3406 TA1
272 365 — —
G3408 NA 190 255 — —
G3408 TA2
298 400 — —
G3408 TA1
302 405 — —
G3408 TA1
336 450 — —
G3412 TA2
425 570 302 405
G3412 TA2
448 600 347 465
G3412 TA1
453 607 — —
G3412 TA2,3
475 637 — —
Engine Engine

30
G3512
G3500 RATINGS
1400 rpm 1200 rpm
bkW bhp bkW bhp
Engine
G3508 TA2,3
472 630 384 515
G3512 NA — — 391 524
G3512 TA2
749 1005 589 790
G3512 TA2,3
705 945 604 810
G3512 TA2,3
— — 642 860
G3516 TA2
— — 858 1150
G3516 TA2,3
943 1265 809 1085
G3516 TA2,3
1000 1340 — —
G3600 RATINGS
1000 rpm 900 rpm
bkW bhp bkW bhp
G3606 TA2,3
1242 1665 1119 1500
G3606 TA1,3
1316 1765 1184 1588
G3608 TA2,3
1659 2225 1491 2000
G3608 TA1,3
1754 2352 1579 2117
G3612 TA2,3
2487 3335 2237 3000
G3612 TA1,3
2632 3530 2368 3175
G3616 TA2,3
3315 4445 2983 4000
G3616 TA1,3
3509 4705 3158 4235
Engine Engine
1
2
3
Low Emissions
Abbreviations used:
Rating Definition
Continuous: Output available without
varying load for an unlimited time.
Continuous power in accordance with
ISO8528, ISO3046/1, AS2789, DIN6271, and
BS5514.
G3500 Family
Caterpillar G3500 natural gas engines represent the
latest in gas engine design. By combining advanced
electronic control systems with the latest
innovations in gas engine technology, Cat engineers
have created a power source perfectly attuned to
today’s needs for higher efficiencies and lower
emissions.
A Heritage of Strength
The basics of the G3500 family are the same as the
world-renowned diesel engines. The block,
crankshaft, bearings, rods, camshafts, and most
other mechanical components are the result of more
than 60 years of diesel design innovation. And the
tighter control of microprocessor technology means
major improvements in fuel efficiency and emission
control.
More Power per Btu
Electronics allow the G3500s to “think” their way
through problems and respond by taking self-
initiated corrective action. Even under continuous
top speed operation and full load, mechanical
strength and electronic smarts assure longer
intervals between overhauls, reduced maintenance,
increased efficiencies and lower life-cycle costs.
G3600 Family
Here is where you will find the real muscle of the
Cat Gaseous Engine family. The G3600s are the
largest members of the line-up, with four
configurations rated from 1119-3509 bkW (1,500-
4,705 bhp). Developed from their diesel
counterparts, they provide a tremendous amount of
strength and durability with a variety of fuels.
Caterpillar Engines Through and Through
Advanced engineering and manufacturing make Cat
G3600s versatile and efficient powerhouses with a
wide operating range and a wide range of fuel
options. The block, crankshaft, rods, bearings,
camshaft, and other components are designed for
diesel pressures far exceeding those required for
gaseous fuel applications. Longer life and lower
maintenance are the results.
In applications around the world, Cat G3600s are
providing “around-the-clock,” year-in year-out
service under the most difficult circumstances.
Performance, productivity, fuel economy, and
environmental advantages add up to real value.
G3612
G3500 • G3600 E N G I N E S

31
3176C ATAAC1, 3 201 270 2100 11 500 42.6 7500 27.8 7E-B012-0
3176C ATAAC1, 3 231 310 2100 13 500 43.5 7500 24.2 7E-B012-0
3176C ATAAC1, 3 250 335 2100 15 000 44.8 8000 23.9 7E-B012-0
3406E ATAAC1 269 360 2100 17 000 47.2 14 000 36.9 7E-B018-0
3406E ATAAC1 298 400 2100 18 500 46.3 13 000 32.5 7E-B018-0
3406E ATAAC1 317 425 2100 20 000 47.1 12 000 28.2 7E-B018-0
3406E ATAAC1 336 450 2100 21 000 46.7 12 000 26.7 7E-B018-0
3406E ATAAC1 354 476 2100 22 000 46.3 13 000 27.4 7E-B018-0
3406E ATAAC1 366 490 2100 22 000 44.9 10 500 21.4 7E-B012-0
3406E ATAAC1 373 500 2100 24 000 48.0 12 500 25.0 7E-B012-0
Engines for Underground Non-Gassy Mines and Tunnels and in
Areas of Underground Coal Mines Where “Non-Permissible” Equipment is Allowed
(MSHA, Part 7, Category B)
Vent Rate Particulate Index MSHA
Model Type bkW bhp rpm cfm cfm/hp cfm cfm/hp Cert. No.
MSHA Certified Engines
Exceed Your Toughest Standards
Cat offers the widest range of MSHA certified engines
in the world. For hard rock or gassy mines, MSHA vent
rates for Cat engines for underground mines are among
the lowest available.
Let us help you select the right engine for your job,
mechanical or electronic. By applying just the right
technology, you can reduce owning and operating
costs – even add more equipment – while achieving
the emission control you need.
3406E
1
Electronically controlled/governed
2
Mechanically governed
3
Also approved to CANMET/CSA (Cert. No. 1099)
Nomenclature:
ATAAC .......Turbocharged and Air-to-Air Aftercooled
Underground Mining

32
NORTH AMERICA
Caterpillar Inc.
Peoria, Illinois, U.S.A
Tel: (309) 578-6298
Fax: (309) 578-2559
EUROPE, AFRICA, MIDDLE EAST
Caterpillar UK Limited
Vicarage Farm Road
Peterborough, UK
Tel: +44 1733 583568
Fax: +44 1733 584624
EASTERN EUROPE
Commonwealth of Independent States
Caterpillar S.A.R.L.
Moscow, Russia
Tel: (7) 095-755-6811
Fax: (7) 095-785-5688
ASIA
Caterpillar Asia Pte., Ltd.
Singapore
Tel: (65) 6628-399
Fax: (65) 6628-414
CHINA
Caterpillar China Ltd.
Hong Kong
Tel: (852) 2848-0320
Fax: (852) 2848-0223
JAPAN
Caterpillar Power Systems, Inc.
Tokyo
Tel: (81) 3-5786-3800
Fax: (81) 3-5786-3809
AUSTRALIA
Caterpillar of Australia Ltd.
Victoria, Australia
Tel: 61-3-9953-9333
Fax: 61-3-9338-9021
MEXICO, THE CARIBBEAN,
SOUTH AMERICA
Latin America Commercial Division
Miami, Florida, U.S.A.
Tel: (305) 476-6876
Fax: (305) 476-6850
E-mail: CAT_Power@Cat.com
www.CAT-industrial.com
®
Your Cat dealer is prepared to answer
any questions you may have about Cat
Power Systems, customer support, parts
or service capability anywhere in the
world. For the name and number of the
Cat dealer nearest you, call Caterpillar
Inc. World Headquarters in Peoria,
Illinois, U.S.A., or the subsidiary office in
your corner of the world.
LECH3874-02 (02/2004) ©2004 Caterpillar
www.CAT-industrial.com
Materials and specifications are subject to change without notice.
Rating ranges listed include the lowest and highest available for a specific engine or family of engines.
Load factor and time at rated load and speed will determine the best engine/rating match.
Caterpillar.
Your Local Resource.
Worldwide.

Cat industrial engines brochure

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